If you lose, it hurts, but as ...

If you lose, it hurts, but as long as you have fought hard, you can still feel good about yourself.
 Ivan Lendl

Quotes from the same author

I believe the brain is like a muscle - like any other it can be improved.
 Ivan Lendl
Because in order to beat Jimmy, I had to get around the ball a little bit quicker so I wasn't always on defensive and catching the ball on last stride, that I had little more time. Once I was able to get little bit quicker, then it has helped me a lot.
 Ivan Lendl
Don't mistake activity for achievement - practice the right way. - John Wooden I only play well when I'm prepared. If I don't practice the way I should, then I won't play the way that I know I can.
 Ivan Lendl
In tennis you move a lot. Golf you dont. In tennis, you can have a bad half-hour, but you cant in golf. You can lose the first set in tennis and still win.
 Ivan Lendl